USB connection problem with iPhone
I have a MacBook Air Early 2015 and an iPhone 5s.
When I plug my iPhone into system my iPhone oscillates connecting and disconnecting rapidly.
I did almost everything: changed the cable, cleaned the dock, SMC, NVRAM reset, iTunes reinstall, iPhone's hard reset and restore privacy settings, even did a clean Mac OS install but nothing changes.
With pen drives, MIDI controllers etc... the USB works properly, and it does with my iPhone if I do not log-in into my Mac, just turning it on and plug the USB in. In that case there is no disconnect/reconnect cycling problem. But, immediately after I log-in it starts up.
I was in two different Apple Service and they said that is something software problem and possibly, a clean Mac reinstall solves it. It did not solved it! I tried to connect my iPhone into other notebooks, there were no problem.
Any idea? (Sorry for my poor English...) And yes, the cable is original.